You'll need:
1 slice of bread per muffin cup
2 slices of bacon per muffin cup
1 egg per muffin cup (or 2 if you really like eggs!)
Salt and pepper to taste
Preheat oven to 375 degrees. Using a cookie cutter, cut circles out of each piece of bread. Grease a muffin tin and press bread circles into the cups. Place in the oven for about 5 minutes until bread is just slightly toasted, then remove from oven. Cook bacon in a skillet until halfway done (approximately 3 minutes) then place 2 slices of bacon on top of the bread to form a cup. Crack an egg (or eggs if you're using two) into each muffin cup, then place breakfast cups in oven and bake for 20 minutes or until the eggs are set. Season with salt and pepper as desired then serve.